Compensating spool.



zen of'the United States, in the-County of Sufolk and State of Massahusetts,` have invented a new and useful Im-*jprovementin Compensating Spools, ofwhich the following 'isa ing drawings, caton, n explanngits nature;

. UNITED STATES :PATENT mm i i FRANK f yOF BOsToN, MAssAeHU'sErrs j COMPE'NSATING SPOOL'..

Specificatoi of Letters Patenta' Application filed July 18,1904. Serial No. 216.911.`

Patnted ma g wa;

'o all whomiit ma concerm' Be it 'known-that I, FRANK E. 'CoLE,' a citi- I full, clearjandeXact descrip ton, referencebeing 'had to the accompanyformin'g a part 'of this specifiy invention' relates &to an improvement in` compensating spools, being'especiallyfde'- signed forja spoolon which -iswounda perforated sheet used in musical or otherinstruments pneumatically- 'actuated According" to its usual mode ofoperationin these' instru t ments the perforated sheet is bofne' by one' s ool, off from ;which it `-t e end'of a 1 'Hacker-board] moves to pass over i socalled,` or other member' havnga Wnd other or take-up spool; nin ofthe machine the sheetis -retained in suo n'anner that its perforations will properly coincide or track. right with respect to the channels of i the tracker-board, and such retention is obtained' by `the flanges of the spools laterally engagingwith the fsdes 'of the paper and so 'acting `as guides therefor with' respect to the tracker-board. Owing to una controllable inaccuracies in the size' of the -perforated sheet or .to difficulties naturally' resulting om its rnanner of retention, as before 'stated', the sheet is very likely to become laterally displaced from' its normally true and the entire instrument accordingly`fail to peratevproperly. This ,is "especially true by reason ofthe fact that the paper corprising.

flanges or, in other words, forjadjisting one residing at Boston,

channels and thence'passes onward to bewourj'd upon an In the normal run`-- ,e P T; sition relatively to the tracker-board when' its perforationswill not track' right with the.. ways or wind-channels in saidtracker-board,

thereby when the one side of the spool thattlie I comes displaced (for. the 'following -reasons.

both directions its adjust'able' flange or both flanges which compensatinm'ght be made for any inaccuracy or abnormal Va-' riation in the pap continue to retan and guidettheperforated' sheet Instead of osition'with res ect to the tracker-board., a he adjustment oi some spools` one flange hasibeen `adjustable,'

the flange or flange s'o'f the spool 'has been obtained in variouswaysj In er or sheet and the flanges. 4

'sa displacingit from ts correct i in {others both i'langes;` In order; howevery;

that the'flangs may be 'permitted to follow thelincreasin paper,`it'ha 's I `should'be controlled by some s 'rin or other:

or diminishng *width of; the

een' found necessary that' they2 may be forced; out y paper, Contacting. -Accordingly the spring which heldthe spool in the instrument has been used also as" the spring for controlling cultyv has'been, however, Wit this spring at Thepaper normallyjswells in ape still b from the center of the sheet; On the one 'side of the spool swelling against the flan'ge backed by/the spring holdng thepspool in place the paper would press ths spi'ng out against the 'tension-of the-spring. Uponjthe other side" of the s fixed', t ere being -nol'spring p flafn e itself'if made adjustable with respect to tlie spool would not be pressed out by the swelling paper; but the paper hearing against ool, however, the fian e remainingi,

acking; the' the'flange'would act to throw thegentire* spin- I 'the spindle, yetwhen' I had been unwond it was very often foumi" dle and paper thereon over to the other side 'against the; other flange,` adjusting itsstill far- 'ther back againstthetension of the spring with the efiect that the 'paper or sheet would be displaced H I forations of course f would not: track right With the hol inthe tracker-board. True,

the adjustmentwouldbe such that the edges toward that 'side 'and so its per of the paper would not become crimped as it z swlled." At the sameitimthere would be `the displacem ent,of the sheet` with respect to' the tracker-board, as above' explained.` Another difliculty existed 'in u the sp'ool, 'and 'this was that 'whlethe expnsion .of the paper might hold back andafi ect the adjustment of the flanges Without its edges becoming crimped when the paper Was wound upon the peforated sheet impossible to'rewnd it, for the reason that los Ilo

there bein no paper upon the spindle to hold back the anges they become restored, as it were, by the tension of the spring which acted to crimp up the edges of any sli ht amount of pa er which might then be le t upon the spind e and revented the paper from being rewound. n view of these eonsiderations,

therefore, by my invention I have provided i a'n improved means by which an ad ustment of the fianges at both ends of the spool each, respectively, may beobtained by a s ring I tension independent of the spring which olds means is provided by which after the playing portion sufficient amount of paper will still be left upon the spool to prevent itsflanges being restored by the s ring tensionby which they are controlled', with the efiect that the paper may be rewound upon the spool without dit'- My relation to various other incidental details of Construction, all of which can best.be *seen and understood by reference to the drawings, in which- Figure 1 shows the spool in side (Elevation. Fig. 2 shows the spool with the paper thereon in longitudinal vertical section, the spool being shown also as placed in the instrument.

Fig. 3 shows a cross-section' on the line 3 3 of Fig. 2.

i In the drawings, A represe'nts the spool, having a body portion ores indie a and heads or' flanges a' a& The spin le I prefer to make hollow' an d of paper which gives a desirablelightness toi-,the spindle and which paper also will not warp or bend out of shape, as some other substances might do. Into the ends of the hollow spindle are fixed plugs a a? From the center of each of these plugs there projects a' short shaft a which shaits at either end of the spool bear, respectively, the pins a by which the spool is mounted in the instrument. "T he flanges a' a? are mo'unted upon the shafts a In their adjustment the flan es when moved inwardly are adapted to t flush up against the ends of the spindle.

When adjusted outwardly, the fianges move each to a stop a which takes' the form of an annular collar turned upon the ends of the shafts. The flanges are yieldingly held each "by a tension-spring a arranged upon the -steadof bearing against the out-side of its I shaft upon which the fiange is adjustahle and between it and the stop on the end of the shaft a gainst which the spring bears. In-

fiange each spring bears against an annular '6 shoplder a inside the fiange, ior it is to be,

of the sheet has become unwounda &15,511

noted that each fiange is made recessed to receive the spring. The advantage is that the spring is for the most part concealed, with the additional advantage also that the shaft upon which the flange moves can be made very short, for the recess in the fiange is made larger than the stop on the end of the shaft, so that when the iange is pressed back in its adjustment it .may slip in part over the stop. By comes provided with end fianges having a yielding spring retention independent of the spring B, which holds the spool in the instrument, which spring and the usual manner of its holding the spool in the instrument is shown in Fig. 2, B' and B in said figure representing the usual fixings for the retention of the spool. On account of the fiangcs being'thus independently ad justable, When the paper swells or contracts, as it does equally `1IL both directions from the center of the board.

A spool thus constructed is of superior utility in addition to its special adaptation above described. The parts of the spool are permanently combined. There is nothing to drop away or get out of order even when the perforated sheet is not wound upon the spindle. In other words, the sheet has nothing to do with holding the parts of the spindle in place. The fianges of the spool are maintained in *a nanner to be easily adjustable and are sensitive to the least variation in the paper, this especially by reason of the fact that the springs controlling the fianges may be of just suflicient tension to hold the paper in place The spool can also be made at verylittle cost; As before stated, the spindle is preferably made of paper or strawboard.`

The plugs in the end oi' the spindle and shait maybe turned ou t of' wood, are a mere'tem of cost.

While the spri'igs vention to provide a means which Will pre thus constructing the spool it be-` Theparts'of the *spool can be easily put-together, and'in this IIO I t thicknesses to'hold back the flanges. By -my vent the flanges being springs after the paper from the spool the tendency was for the flanges to become restored by the tension of 4 their springs, 'which actedto crimpup the 'edges of any slight amount of patpen which might thenbe. left upon the spn le and in any case would prevent the paper' from being rewound in the instrument or at least until by somemanual manipulation the flanges could be held back. and the paper rewound upon' the spindle with a suflicent number of u invention I provide a meansbywhich after V the playing portion of the shee't. has been unwound asufficient amount of paper will still.

be left. upon the main spindle to prevent the 4 flanges being restored by the spring tension. This paper I prefer to be of the same composition 'and consistency as thej paper ofthe 'spindle to'remain practically as a part thereperforated sheet in order that it may be susceptible to the same atmospheric and other conditions. T hepaper in so far as the scope of my invention s concerned may be a part wound around the mainfspindle and separate from the 'perforated sheet" to which the said sheet may be attached. -I Prefer, however, thatthis paper be made integral with the perforated sheet or, in other words, 'that the perforated sheet proper, C, be made longer by a blank extension C' beyond its playing or per-.

forat'ed part, which extension C' shall be adapted after beingwound upon the main of, forming an auxiliary spindle. The windings of aper forming ths auxiliary spindle should be suflicient in number to hold back the flanges, and for this purpose prefer that a dozen or more Windings of paper be made or left upon the main indle; the

s number depending in a measure, of course, on the strength of the paper and the tensional Stress bearing upon or controlling the flanges.

-It is also to be observed by reference to the becoming resse atmos drawings that the windings of paper forming ghtl' lon er than the main spindle in order to ailow or either the expansion or contraction of 'the paper, theadjustable flanges then following the edge of the aper 'when contracting or (i out thereby upon its-expans'ion. n orderthat air may reach this auxiliary spindle, so that its' windings of pabe subject practically to the'same erio conditions as the playing 'portion o' the sheet, I prefer to provide it with holes' or perforations c as distinct from 'the perforations c' of the'playingprtion of the per may properl sheet. A further means for providing for the ingress I upon the spindle is by a spiraljchannel a jformed around the surface of the main spinl dle itself, which when the s indle is formed of paper can easily be made y slightly sepa-* rating the edges of the outer coil of paper of which the .spindle is made. By this 'means the flange or'flanges of the from being tensionally press ?stored after the playing portion-of the perfo- 1rated sheet has become unwound, so that the paper or sheet can be rewound in the instrument without difliculty. 3 Havingthus fully described s ool arekept' e -back or reof air for the paper remaining m claim'and desire to secure by etters' 'Pate er' tension upon either end thereof, and-in indle slightly wider than said and i around which the ;sheet is wound, which au 'uound around the 'same to form an auxliary erforated music-` iary'spindle bears number to withstand the *tension thereof combination with said main spindle, paper main spindle, i i

ainst said ,fianges andwith' cols suflicien't a i -wlhen-the perforated' 'music-sheet has been u w in operation of the spool, 'subi y' as and for the purposes set forth.

i 2. A spool of the character specified havnrg a spindle, adjustable flanges under tension upon either .end'threofl andin comslightly wider than' said ina'in spindle, a port'on of which sheet is. wound around said niain spindle to form .an auxiliary spindle with the edges thereof hearing against said fi nges and with coils suflicient in number to wfithstand the tension thereof when the playiig ortion of the sheet has become unwound i t e operation of the spool and which aux ilfiarys ndle or portion of said sheet remains ola sai main spindle when the playingport on of said sheet has become unwound in the o erqtion' of the spool, substantially as 'and fpr the purposes set forth.

-\ i, 3. A s oolof the character specified havi'g an a justable fiange and mounting therebination with said spindle, a music-sheetfor, a stop on said mounting for limiting the 1 adj ustment of said flange; "and a spring on said mounting between said -stop and flange which spring extends into a recess on said fl'yange to bear 'against a' shoulder" nsde the J. E. R. HAYES, i J. M. DoLAN.

same and which recess is made larger than 

